Batch Add/Edit/Delete in API

I am making a desktop to-do list app and am in the process of syncing. The user will potentially have added, edited or deleted more than one task between syncs. Instead of calling Add, edit, or delete for each individual item, is there a way to send the API several items and only hit your server once?

Remember the Milk also restricts the API to only people that they have approved to use it, whereas Toodledo allows anyone to use our API. Because we allow anyone to use it, we have to have tighter restrictions to protect our server from misuse or sloppy code. However, we are happy to lift the restrictions for anyone who has a good reason to do so. Just send us an email or create a support ticket with your AppID and what you are using it for.